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Topic Review (Newest First)

10-17-2013 09:18 PM

oldbogie

Quote:

Originally Posted by maddart

I was going to use the ptfe on the threads and vaseline under the head bolt/washer. I have a builders book recommending vaseline. Thoughts?

Let's go back over this, if you're going to use ARP studs or fasteners use their proprietary sealants and lubricants. This web site is rife with guys that pulled the threads right out of the castings doing otherwise.

Between the bolt head or nut when clamping down on aluminum there goes hardened, ground washer, this is not something you'll find at the home improvement center near you. This washer prevents the rotation forces of the bolt head or nut from digging into the aluminum which will happen without the washer reguardless of the lubricant used. The gouging of the aluminum not only damages the part but also provides a false torque reading. Plus the damage doesn't stop with the installation, the aluminum continues to plastically deform under the fastener from the clamping force among others allowing said fastener(s) to loosen over time. Some of the others are; the aluminum has a greater amount of expansion and contraction with changes in temperature than iron or steel so it is constantly working into the fastener when it heats up and falls loose when it cools, this takes chunks of aluminum out from under the fastener head as well. The hard, ground washer helps reduce this as well as the other functions it performs buy placing the fastener load over a wider support area.

Get on ARP's web site and study what they say, call 'em, what-ever; but follow their instructions not the crap you get from friends, the corner shop, or on the web, it'll save you basket load of trouble down the road.

Always remember the "cheap way out....leads back in!"

Vasolene, well you know what that's good for, use it there, not on fasteners.

Bogie

10-17-2013 07:37 PM

maddart

They are aluminum heads.

10-17-2013 07:18 PM

cobalt327

Quote:

Originally Posted by maddart

I was going to use the ptfe on the threads and vaseline under the head bolt/washer. I have a builders book recommending vaseline. Thoughts?

Vaseline is not a high pressure lubricant- which is what you want under a washer that's seeing a big clamping load as well as a high frictional load. Moly-based lube is best used in these applications.

10-17-2013 07:12 PM

1971BB427

Are these aluminum heads? I thought ARP only supplied washers with bolts for aluminum head installs?

10-17-2013 04:14 PM

maddart

I was going to use the ptfe on the threads and vaseline under the head bolt/washer. I have a builders book recommending vaseline. Thoughts?

10-17-2013 02:30 PM

oldbogie

Quote:

Originally Posted by cobalt327

ARP 'likes' for you to use their thread lube and their torque specs. The specs sometimes vary from stock, so it is always advisable to check against the part number of the bolts you're using to be sure. In your case, 70 ft/lbs is correct- when using ARP lube. If using motor oil, the torque to get the same amount of preload would be greater because the ARP lube works better than motor oil for reducing friction. More here.

A big X2, this is a place where if you mess this up you can suck the threads right out of the block. So follow ARP's directions, carefully!

Bogie

10-17-2013 11:46 AM

cobalt327

Quote:

Originally Posted by maddart

Removed heads and all bolts are ARP. It looks like a blue RTV was used on lower portion of bolts and anti sieze up top.
I want to know the proper sealant and torque lube to use and how to apply and the proper torque setting for these bolts.

ARP 'likes' for you to use their thread lube and their torque specs. The specs sometimes vary from stock, so it is always advisable to check against the part number of the bolts you're using to be sure. In your case, 70 ft/lbs is correct- when using ARP lube. If using motor oil, the torque to get the same amount of preload would be greater because the ARP lube works better than motor oil for reducing friction. More here.

When it comes to sealer, if a little is enough, A LITTLE IS ENOUGH! (a LOT is NOT better) Jim

Remember the old hot rodder's axiom Jim,
"If some is good, then more is better and too much is just right."

10-17-2013 09:10 AM

Mr. P-Body

No, RTV is not correct. It's too thick and will give false torque readings, as well as clog things up when it goes to the wrong places.

The Teflon pipe "dope" is okay. We use Permatex "Aviation" for this, on the threads ONLY. Unless the heads have been drastically ported exposing the bolt holes between intake runners, no need for sealer on the top. A drop of engine oil is all that's called for.

When it comes to sealer, if a little is enough, A LITTLE IS ENOUGH! (a LOT is NOT better)

FWIW

Jim

10-12-2013 05:59 PM

68NovaSS

Here's the torque pattern.

10-12-2013 04:08 PM

maddart

Cool, thanks
Yes it is the sbc

10-12-2013 03:55 PM

ericnova72

They were done correctly....RTV silicone sealer, #2 Permatex, or Teflon pipe thread sealer on threads, and motor oil or anti-sieze under washer and bolt head.

Assuming this is the SBC you are working on....
Torque to factory spec (70 ft.lbs.) in the proper sequence, in at least 3 steps - i.e. 25 ft.lbs. then 50 ft.lbs. then final at 70 ft.lbs.

10-12-2013 02:16 PM

maddart

ARP head bolts

Removed heads and all bolts are ARP. It looks like a blue RTV was used on lower portion of bolts and anti sieze up top.
I want to know the proper sealant and torque lube to use and how to apply and the proper torque setting for these bolts.